Simon began to contribute to shows as a writer while she was still a cast member at Search for Tomorrow. She has worked steadily as a breakdown script writer ever since. With recurring, part-time acting roles, she has occasionally worked at a show as a writer and as an actor; she has also worked on one show as a writer while appearing on another program as an actor.

Simon's first marriage, to Ed Easton, ended in divorce. She met actor Peter Simon while they were both part of the cast on Search for Tomorrow. The couple married in 1975 and have raised five children (some from previous marriages, as well as one born to the couple, Kate Hall, who is also a daytime soap writer).